Polymers

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Polymers

• Prof. David Roylance
• Department of Materials Science and Engineering

Advice to Benjamin Braddock, 1967 Ive got one
word for you, my boy
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Plastics, my boy ...
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• Some polymer history
• ca 1492 Columbus (Priestly ca 1800)
• ca 1839 Goodyear/Hancock
• ca 1930 Staudinger/Carouthers
• ca 1953 Watson/Crick
• ca 1955 Ziegler/Natta
• ca 1970 Kwolek

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The Polymeric Solid State
Semicrystalline microstructure
Blow-molded HDPE milk bottle (recyclable)
Covalently-bonded long-chain hydrocarbon
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Stiffness vs. Temperature
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Molecular Orientation and Strength
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Polyamides
Carouthers nylon 66
Kwolek aramid
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Kevlar Fibers a polyaramid
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Modern Lightweight Personnel Armor
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Panel and Bullet After Impact
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Strain and Displacement in Fabric Layer
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Vs-Vr Plot Kevlar 29, Single Layer
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Influence of Strength and Stiffness on V50
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